Allow SELECT NULL as EMPTY_FIELD, Patrick.

bmomjian · bmomjian · commit fe54c54da305 · 1997-09-12T22:14:48.000Z
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.43 1997/09/08 03:19:57 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.44 1997/09/12 22:14:48 momjian Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -2740,7 +2740,7 @@ res_target_list2: res_target_list2 ',' res_target_el2
 		;
 
 /* AS is not optional because shift/red conflict with unary ops */
-res_target_el2: a_expr AS ColId
+res_target_el2: a_expr_or_null AS ColId
 				{
 					$$ = makeNode(ResTarget);
 					$$->name = $3;

Original file line number	Diff line number	Diff line change
`@@ -10,7 +10,7 @@`
`10`	`10`	`*`
`11`	`11`	`*`
`12`	`12`	`* IDENTIFICATION`
`13`		`- * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.43 1997/09/08 03:19:57 momjian Exp $`
	`13`	`+ * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.44 1997/09/12 22:14:48 momjian Exp $`
`14`	`14`	`*`
`15`	`15`	`* HISTORY`
`16`	`16`	`* AUTHOR DATE MAJOR EVENT`
`@@ -2740,7 +2740,7 @@ res_target_list2: res_target_list2 ',' res_target_el2`
`2740`	`2740`	`;`
`2741`	`2741`
`2742`	`2742`	`/* AS is not optional because shift/red conflict with unary ops */`
`2743`		`-res_target_el2: a_expr AS ColId`
	`2743`	`+res_target_el2: a_expr_or_null AS ColId`
`2744`	`2744`	`{`
`2745`	`2745`	`$$ = makeNode(ResTarget);`
`2746`	`2746`	`$$->name = $3;`